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Home >> Infiniti >> 2018 >> QX80 AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission (Diagnostics) >> Description >> System >> A/T Control System >> Fail-safe >> Fail-Safe Function
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Fail-Safe Function

DTC

Vehicle condition

Vehicle behavior for 1st fail-safe

Vehicle behavior for 2nd fail-safe

Vehicle behavior for final fail-safe

P0615

--

Starter is disabled

--

Starter is disabled

P0705

--

  • Fixed in the "D" position (The shifting can be performed)
  • Lock-up is prohibited when 30 km/h (19 MPH) or less
  • The shifting between the gears of 3 - 4 - 5 - 6 - 7 can be performed
  • Manual mode is prohibited
  • Shift position indicator is switched OFF
  • Starter relay is switched OFF (starter is disabled)
  • Back-up lamp is OFF
  • Large shift shock

--

  • Fixed in the "D" position (The shifting can be performed)
  • Lock-up is prohibited when 30 km/h (19 MPH) or less
  • The shifting between the gears of 3 - 4 - 5 - 6 - 7 can be performed
  • Manual mode is prohibited
  • Shift position indicator is switched OFF
  • Starter relay is switched OFF (starter is disabled)
  • Back-up lamp is OFF
  • Large shift shock

P0710

Between the gears of 1 - 2 - 3

  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited

--

  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited

Between the gears of 4 - 5 - 6 - 7

  • Fix the gear while driving
  • Manual mode is prohibited

--

P0717

Between the gears of 1 - 2 - 3

  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited

--

  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited

Between the gears of 4 - 5 - 6 - 7

  • Fix the gear while driving
  • Manual mode is prohibited

--

P0720

Between the gears of 1 - 2 - 3

  • Only downshift can be performed
  • Manual mode is prohibited
  • A vehicle speed signal from the combination meter is regarded as an effective signal

--

  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited

Between the gears of 4 - 5 - 6 - 7

  • Fix the gear at driving
  • Manual mode is prohibited
  • A vehicle speed signal from the combination meter is regarded as an effective signal

--

P0729

P0731

P0732

P0733

P0734

P0735

P1734

Small gear ratio difference

Engine torque limit: Max 150 Nm

--

Engine torque limit: Max 150 Nm

Great gear ratio difference

Neutral malfunction between the gears of 1 - 2 - 3 and 7

  • Locks in 2GR, 3GR or 4GR
  • Manual mode is prohibited

--

  • Locks in 1GR
  • The shifting between the gears of 1 - 2 can be performed
  • The shifting between the gears of 1 - 2 - 3 can be performed
  • The shifting between the gears of 4 - 5 - 6 can be performed
  • Manual mode is prohibited

Other than the above

  • Locks in 1GR, 2GR, 3GR, 4GR, 5GR or 6GR
  • Fix the gear while driving
  • Manual mode is prohibited
  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited
  • Locks in 1GR
  • The shifting between the gears of 1 - 2 can be performed
  • The shifting between the gears of 1 - 2 - 3 can be performed
  • The shifting between the gears of 2 - 3 - 4 can be performed
  • The shifting between the gears of 3 - 4 can be performed
  • The shifting between the gears of 4 - 5 - 6 can be performed
  • Manual mode is prohibited

P0730

--

  • Locks in 5GR, 6GR or 7GR
  • Manual mode is prohibited
  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited
  • Locks in 1GR
  • The shifting between the gears of 1 - 2 can be performed
  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited

P0740

--

  • Lock-up is prohibited
  • Slip lock-up is prohibited

--

  • Lock-up is prohibited
  • Slip lock-up is prohibited

P0744

--

  • Lock-up is prohibited
  • Slip lock-up is prohibited

--

  • Lock-up is prohibited
  • Slip lock-up is prohibited

P0745

--

--

--

--

P0750

P0775

P0795

P2713

P2722

P2731

P2807

--

  • Locks in 2GR, 3GR, 4GR, 5GR, 6GR or 7GR
  • Manual mode is prohibited

--

  • Locks in 1GR
  • The shifting between the gears of 1 - 2 - 3 can be performed
  • The shifting between the gears of 3 - 4 - 5 can be performed
  • The shifting between the gears of 4 - 5 - 6 can be performed
  • The shifting between the gears of 1 - 2 - 3 - 4 - 5 - 6 can be performed
  • Manual mode is prohibited

P0780

--

  • Locks in 3GR
  • Manual mode is prohibited

--

  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited

P1705

--

  • Downshift when accelerator pedal is depressed is prohibited
  • Upshift when accelerator pedal is released is prohibited
  • Manual mode is prohibited
  • Downshift when accelerator pedal is depressed is prohibited
  • Upshift when accelerator pedal is released is prohibited
  • Manual mode is prohibited
  • Downshift when accelerator pedal is depressed is prohibited
  • Upshift when accelerator pedal is released is prohibited
  • Manual mode is prohibited

P1730

--

  • Locks in 1GR, 2GR, 3GR, 4GR, 5GR, 6GR or 7GR
  • Manual mode is prohibited
  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited
  • Locks in 1GR
  • The shifting between the gears of 2 - 3 - 4 can be performed
  • The shifting between the gears of 3 - 4 can be performed
  • The shifting between the gears of 4 - 5 - 6 can be performed
  • Manual mode is prohibited

P1815

--

Manual mode is prohibited

--

Manual mode is prohibited

U0100

U0300

U1000

Between the gears of 1 - 2 - 3

  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Manual mode is prohibited

--

  • The shifting between the gears of 1 - 2 - 3 can be performed
  • Line pressure is set to the maximum hydraulic pressure
  • Manual mode is prohibited

Between the gears of 4 - 5 - 6 - 7

  • Fix the gear at driving
  • Manual mode is prohibited

--

P0720

and

P1721

--

Locks in 5GR

--

Locks in 5GR